[Markoff]

construction cost maybe, heating/cool expenses difference won't be so tiny, quite the opposite and it's not only about expenses, lower ceiling is also faster to cool/heat, so you have to wait shorter time

I can really understand high ceiling (in new residential buildings) only for people who use fake built-in second floor (dunno the word in English, maybe mezzanine by my quick research) for like bed or something, but what's the point then and why not build proper separated 2nd floor if you are building new house

[bluGill]

In a modern house insulation is very good (in general) and so your heating cooling expenses are not that high over a lifetime.

[Markoff]

So you are telling me cooling down or heating bigger volume of air takes same amount of energy/money than smaller volume?

[bluGill]

The larger use of energy in HVAC is recovery from losses from convection, conduction, radiation, and air leaks. The one time heating or cooling is small.

[nradov]

I always find in funny when NH users try to claim that consumers like the wrong things.